功率方向元件动作判据的改进  

Analysis on the Advancement of Operating Criteria for Power Directional Relay

作　　者：杨兰[1] 杨庭芳[1] 张艳平[1] 

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410076

出　　处：《长沙电力学院学报（自然科学版）》2006年第2期10-11,31,共3页JOurnal of Changsha University of electric Power:Natural Science

摘　　要：提出一种改进的功率方向元件的动作判据,即通过将测量的电流、电压相量进行适当移相、组合后形成相应的电压波形,并根据所形成的电压波形之间是否有相交角θ作为动作判据.分析表明其电压动作死区很小,比传统的功率方向元件具有更高的动作灵敏性.One better operating criteria for power directional relay is put forward in this paper. The mended power directional relay change the phases of measured current and voltage and gets correspond voltage wave, and then whether there is intersectant phase θ between these voltage waves or not may be considered as the operating criteria. Analysis shows that the voltage operating dead zone is small and have more sensitivity than traditional power directional relay.

关 键 词：功率方向元件 移相 交角 动作判据 

分 类 号：TM774[电气工程—电力系统及自动化] TM773